EP1773592B1 - Precontrolling a register during speed changes - Google Patents

Precontrolling a register during speed changes Download PDF

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Publication number
EP1773592B1
EP1773592B1 EP05772246.4A EP05772246A EP1773592B1 EP 1773592 B1 EP1773592 B1 EP 1773592B1 EP 05772246 A EP05772246 A EP 05772246A EP 1773592 B1 EP1773592 B1 EP 1773592B1
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EP
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Prior art keywords
register
control module
change
control
signals
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Revoked
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EP05772246.4A
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German (de)
French (fr)
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EP1773592A2 (en
Inventor
Andreas Voss
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Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0009—Central control units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B41F13/12—Registering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/16—Programming systems for automatic control of sequence of operations

Definitions

  • the invention relates to a method for correcting a register error. Such methods have been known for a long time. They are among others in the still unpublished German application with the application number 102 54 836 discussed.
  • Register errors have a number of sometimes very complex causes, including those made by the operator or the machine control changes in the operating parameters of the machine. These operating parameters include, among others, the printing speed or the temperature prevailing in the machine hall.
  • register errors that manifests itself on the substrate and then determined or measured. Then register signals are generated which drive actuators or actuator means that bring the impression cylinder in a position in which the register errors are minimized.
  • the object of the present invention is to carry out a method for correcting a register error, which results in less printed substrate of limited quality or waste.
  • the invention is based on a register method of the prior art in which also the register errors caused by the change of the operating parameters of the machine are minimized in a conventional manner.
  • the invention is equally applicable to the longitudinal as well as the transverse registers. Therefore, among the actuators in the longitudinal registers understood primarily the drive of the printing cylinder. When cross registers actuators are used, which change the position of the printing cylinder transversely to the printing material.
  • a control device within the meaning of claim 1 is any type of control or operator terminal, with which or by which changes the operating parameters of the printing press can be made.
  • a control module may be a separate hardware element, but also a software module integrated into a modern computerized control device.
  • the invention takes advantage of the fact that changes in the operating parameters performed by the operator or a modern machine control are known before printed material of inferior quality is produced. Often, the effects of the changes are empirically known and / or analytically calculable or predictable.
  • Fig. 1 shows a schematic diagram of two inking units F1 and F2 a gravure printing machine.
  • the inking units each comprise the format cylinders D1 and D2 and the impression rollers P1 and P2.
  • the printing material web which is identified by the reference numeral 1, runs between the two printing units on the guide roller 2.
  • the course of the printing substrate 1 in the acceleration phase is shown with a continuous line, while the course is shown in dashed lines in a braking phase.
  • the mass or the moment of inertia of the guide roller is crucial for the different trajectory during acceleration and braking, since in both cases, the adaptation of the peripheral speed of the guide roller to the web speed by transferring a force from the printing substrate to the guide roller and so on positive or negative acceleration is triggered. This circumstance leads inter alia to an elongation of the material web.
  • the control module adds to a conductance, which is fed via the control line 8, correction values - also as Register signals are called - up.
  • the correction values arrive via the control line 7 from the calculation module 6 to the control module 5.
  • the calculation module 6 determines from the first derivative of the acceleration after the time da / dt and the values K (machine constant), B width of the printing material, D (thickness of the printing material) and E (modulus of elasticity of the printing substrate) the correction values.
  • K machine constant
  • B width of the printing material B width of the printing material
  • D thickness of the printing material
  • E modulus of elasticity of the printing substrate
  • control device 11 which includes, for example, input means 13 for a machine operator and other computer capacity.
  • the changes in the operating parameters are initiated from here 11, 13 and transmitted via the communication means 9 to the computing module 6 or control module 5.
  • FIG. 2 is a functional or schematic sketch.
  • an industrial computer can also combine the entire functions of the control device 11 and the modules 5 and 6, as indicated by the curly bracket 14.
  • the control and computation modules are preferably program modules and the control lines 7, 8, 9, 10 are any means of communication within the computer.
  • the type of torque transmission 12 of drive M2 to the form cylinder D2 is arbitrary.
  • FIGS. 3 to 5 show the course of speed, acceleration and the first derivative of the acceleration, plotted against the time versus time, when the speed of the web is increased during a period of time, and then held back to the achieved higher level.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Korrektur eines Registerfehlers. Solche Verfahren sind seit langem bekannt. Sie werden unter anderem in der noch unveröffentlichten deutschen Anmeldung mit der Anmeldenummer 102 54 836 diskutiert.The invention relates to a method for correcting a register error. Such methods have been known for a long time. They are among others in the still unpublished German application with the application number 102 54 836 discussed.

Registerfehler haben eine Vielzahl zum Teil sehr komplexer Ursachen, zu denen auch vom Maschinenbediener oder der Maschinensteuerung vorgenommene Änderungen der Betriebsparameter der Maschine zählen. Zu diesen Betriebsparametern gehören unter anderem die Druckgeschwindigkeit oder die in der Maschinenhalle herrschende Temperatur.Register errors have a number of sometimes very complex causes, including those made by the operator or the machine control changes in the operating parameters of the machine. These operating parameters include, among others, the printing speed or the temperature prevailing in the machine hall.

In der Regel kontrolliert ein Maschinenbediener die Registergenauigkeit anhand von Registermarken und nimmt dann Korrekturen vor. In jüngerer Zeit wird die Registergenauigkeit zunehmend unter Zuhilfenahme von Kameras, die den Bedruckstoff kontrollieren, nachgehalten.In general, a machine operator checks register accuracy based on register marks and then makes corrections. More recently, registration accuracy has been increasingly pursued with the aid of cameras that control the substrate.

Diesen Verfahren ist jedoch gemein, dass zunächst ein Registerfehler auftritt, der sich auf dem Bedruckstoff manifestiert und dann festgestellt beziehungsweise gemessen wird. Dann werden Registersignale erzeugt, die Aktoren beziehungsweise Aktormittel ansteuern, die den Druckzylinder in eine Position bringen, in der die Registerfehler minimiert werden.However, these methods have in common that initially occurs a register error that manifests itself on the substrate and then determined or measured. Then register signals are generated which drive actuators or actuator means that bring the impression cylinder in a position in which the register errors are minimized.

Des Weiteren sind Verfahren bekannt (z. B. EP-A- 0 709 184 , US 2003/010242 A1 ), bei denen zunächst aktuelle Maschinenparameter wie die Druckgeschwindigkeit oder der Motorstrom gemessen werden. Diesen Messwerten werden gespeicherte Korrekturwerte zugeordnet, das heißt diese gespeicherten Korrekturwerte werden den Registeraktoren der jeweiligen Druckmaschine zugeführt.Furthermore, methods are known (eg. EP-A-0 709 184 . US 2003/010242 A1 ), where first of all current machine parameters such as the printing speed or the motor current are measured. Stored correction values are assigned to these measured values, that is to say these stored correction values are supplied to the register actuators of the respective printing press.

Auch bei diesen Verfahren entsteht zunächst aufgrund der Änderung des jeweiligen Maschinenparameters ein Registerfehler. Jedoch liegt der Korrektur des Registerfehlers nicht die Messung des Registerfehlers, sondern die Messung eines Maschinenparameters, der Einfluss auf den Registerfehler hat, zugrunde.Even with these methods, a register error first arises due to the change of the respective machine parameter. However, the correction of the register error is not based on the measurement of the register error, but on the measurement of a machine parameter which has an influence on the register error.

Daher kommt es bei allen oben beschriebenen herkömmlichen Registerverfahren immer zum Anfall von bedrucktem Bedruckstoff eingeschränkter Qualität beziehungsweise Makulatur.Therefore, in all the conventional register methods described above, the production of printed substrate of limited quality or waste always occurs.

Daher besteht die Aufgabe der vorliegenden Erfindung darin, ein Verfahren zur Korrektur eines Registerfehlers vorzunehmen, bei dem weniger bedruckter Bedruckstoff eingeschränkter Qualität beziehungsweise Makulatur anfällt.Therefore, the object of the present invention is to carry out a method for correcting a register error, which results in less printed substrate of limited quality or waste.

Die Erfindung geht von einem Registerverfahren des Standes der Technik aus, bei dem auch die durch die Änderung der Betriebsparameter der Maschine hervorgerufenen Registerfehler auf herkömmliche Weise minimiert werden.The invention is based on a register method of the prior art in which also the register errors caused by the change of the operating parameters of the machine are minimized in a conventional manner.

Die Aufgabe wird dadurch gelöst, dass

  • die Steuervorrichtung die Änderung dem Steuermodul übermittelt,
  • welches anhand der Änderung die Registersignale bestimmt,
  • welche die Aktormittel zur Korrektur des Registerfehlers ansteuern.
The problem is solved by that
  • the control device transmits the change to the control module,
  • which determines the register signals based on the change,
  • which drive the actuator means to correct the register error.

Die Erfindung ist in gleicher Weise beim Längs- wie beim Querregistern anwendbar. Daher wird unter den Aktoren beim Längsregistern in erster Linie der Antrieb des Druckzylinders verstanden. Beim Querregistern werden Aktoren verwendet, welche die Position des Druckzylinders quer zur Bedruckstoffbahn verändern.The invention is equally applicable to the longitudinal as well as the transverse registers. Therefore, among the actuators in the longitudinal registers understood primarily the drive of the printing cylinder. When cross registers actuators are used, which change the position of the printing cylinder transversely to the printing material.

Eine Steuervorrichtung im Sinne des Anspruchs 1 ist jede Art von Steuerung oder auch Bedienterminal, mit welcher oder durch welche Änderungen der Betriebsparameter der Druckmaschine vorgenommen werden können. Ein Steuermodul kann ein eigenes Hardwareelement, aber auch ein, in eine moderne computergestützte Steuervorrichtung integriertes, Softwaremodul sein.A control device within the meaning of claim 1 is any type of control or operator terminal, with which or by which changes the operating parameters of the printing press can be made. A control module may be a separate hardware element, but also a software module integrated into a modern computerized control device.

Die Erfindung macht sich zunutze, dass Änderungen der Betriebsparameter, die vom Bediener oder einer modernen Maschinensteuerung durchgeführt werden, bekannt sind, bevor bedruckter Bedruckstoff minderer Qualität produziert wird. Oft sind die Auswirkungen der Änderungen empirisch bekannt und/oder analytisch errechen- oder abschätzbar.The invention takes advantage of the fact that changes in the operating parameters performed by the operator or a modern machine control are known before printed material of inferior quality is produced. Often, the effects of the changes are empirically known and / or analytically calculable or predictable.

Weitere Ausführungsbeispiele der Erfindung gehen aus der gegenständlichen Beschreibung und den Ansprüchen hervor.Further embodiments of the invention will become apparent from the description and the claims.

Die einzelnen Figuren zeigen:

Fig. 1
eine Prinzipdarstellung zweier Druckwerke
Fig. 2
eine Darstellung des Regelprinzips
Fig. 3
eine Darstellung des Geschwindigkeitsverlaufs des Bedruckstoffs in einer Beschleunigungsphase
Fig. 4
eine Darstellung des Beschleunigungsverlaufs des Bedruckstoffs in einer Beschleunigungsphase
Fig. 5
eine Darstellung des Verlaufs der ersten Ableitung der Beschleunigung des Bedruckstoffs nach der Zeit in einer Beschleunigungsphase
The individual figures show:
Fig. 1
a schematic diagram of two printing units
Fig. 2
a representation of the rule principle
Fig. 3
a representation of the velocity profile of the printing material in an acceleration phase
Fig. 4
a representation of the acceleration curve of the printing material in an acceleration phase
Fig. 5
a representation of the course of the first derivative of the acceleration of the printing material after the time in an acceleration phase

Fig. 1 zeigt eine Prinzipdarstellung zweier Farbwerke F1 und F2 einer Tiefdruckmaschine. Die Farbwerke umfassen jeweils die Formatzylinder D1 und D2 sowie die Presseure P1 und P2. Die Bedruckstoffbahn, die mit dem Bezugszeichen 1 gekennzeichnet ist, läuft zwischen den beiden Druckwerken über die Leitwalze 2. Der Verlauf der Bedruckstoffbahn 1 in der Beschleunigungsphase ist mit einem kontinuierlichen Strich dargestellt, während der Verlauf in einer Bremsphase gestrichelt dargestellt ist. In dem vorliegenden Fall ist die Masse beziehungsweise das Massenträgheitsmoment der Leitwalze entscheidend für den unterschiedlichen Bahnverlauf beim Beschleunigen und Bremsen, da in beiden Fällen die Anpassung der Umfangsgeschwindigkeit der Leitwalze an die Bahngeschwindigkeit erfolgt, indem eine Kraft von der Bedruckstoffbahn auf die Leitwalze übertragen und so eine positive oder negative Beschleunigung ausgelöst wird. Dieser Umstand führt unter anderem auch zu einer Dehnung der Materialbahn. Fig. 1 shows a schematic diagram of two inking units F1 and F2 a gravure printing machine. The inking units each comprise the format cylinders D1 and D2 and the impression rollers P1 and P2. The printing material web, which is identified by the reference numeral 1, runs between the two printing units on the guide roller 2. The course of the printing substrate 1 in the acceleration phase is shown with a continuous line, while the course is shown in dashed lines in a braking phase. In the present case, the mass or the moment of inertia of the guide roller is crucial for the different trajectory during acceleration and braking, since in both cases, the adaptation of the peripheral speed of the guide roller to the web speed by transferring a force from the printing substrate to the guide roller and so on positive or negative acceleration is triggered. This circumstance leads inter alia to an elongation of the material web.

Im Falle einer konventionellen Registerregelung entsteht ein Registerfehler, der erst einmal tatsächlich vorhanden sein muss, um von dem Registersensor 3, der in der Transportrichtung z der Bedruckstoffbahn 1 den Druckwerken D1, D2 nachgeschaltet ist, erkannt zu werden. Erst dann werden Registersignale erzeugt, die zu Korrekturen in den Antrieben der Farbwerke genutzt werden. Der Ablauf eines erfindungsgemäßen Registerverfahrens ist in Figur 2 in Bezug auf das Farbwerk F2 skizziert. Über die Steuerleitung 4 wird der Antrieb M2 des Formatzylinders D2 von einem Steuermodul 5, welches als Softwaremodul oder als Hardwarekomponente ausgestaltet sein kann, vorgenommen.In the case of a conventional register control creates a register error, which must first actually be present to be detected by the register sensor 3, which is downstream of the printing units D1, D2 in the transport direction z of the substrate web. Only then are register signals generated, which are used for corrections in the drives of the inking units. The sequence of a register method according to the invention is described in FIG. 2 outlined in terms of the inking unit F2. Via the control line 4, the drive M2 of the format cylinder D2 is made by a control module 5, which may be configured as a software module or as a hardware component.

In dem dargestellten Fall addiert das Steuermodul auf einen Leitwert, der über die Steuerleitung 8 eingespeist wird, Korrekturwerte - die auch als Registersignale bezeichnet werden - auf. Die Korrekturwerte gelangen über die Steuerleitung 7 von dem Rechenmodul 6 zum Steuermodul 5. Das Rechenmodul 6 ermittelt aus der ersten Ableitung der Beschleunigung nach der Zeit da/dt und den Werten K (Maschinenkonstante), B Breite des Bedruckstoffs, D (Dicke des Bedruckstoffes) und E (Elastizitätsmodul des Bedruckstoffes) die Korrekturwerte. Ein Großteil dieser Werte ist ohnehin der Maschinensteuerung bekannt und kann analytisch weiterverarbeitet werden. Allerdings wird man in der Praxis auch auf, in Speichervorrichtungen abgelegte, empirische Werte, die beispielsweise typisches Materialverhalten oder die Maschinenkonstante K betreffen, zurückgreifen.In the illustrated case, the control module adds to a conductance, which is fed via the control line 8, correction values - also as Register signals are called - up. The correction values arrive via the control line 7 from the calculation module 6 to the control module 5. The calculation module 6 determines from the first derivative of the acceleration after the time da / dt and the values K (machine constant), B width of the printing material, D (thickness of the printing material) and E (modulus of elasticity of the printing substrate) the correction values. Much of these values are already known to the machine control system and can be further processed analytically. However, in practice, empirical values stored in memory devices, which concern, for example, typical material behavior or the machine constant K, will also be used.

Zur erwähnen ist noch die Steuervorrichtung 11, die beispielsweise Eingabemittel 13 für einen Maschinenbediener und weitere Rechnerkapazität umfasst. In der Regel werden von hier 11, 13 die Änderungen der Betriebsparameter veranlasst und über die Kommunikationsmittel 9 an das Rechenmodul 6 bzw. Steuermodul 5 übertragen. Es bleibt jedoch zu beachten, dass es sich bei Figur 2 um eine Funktions- oder Prinzipskizze handelt. So kann ein Industriecomputer auch die ganzen Funktionen der Steuervorrichtung 11 und der Module 5 und 6 auf sich vereinen, wie durch die geschweifte Klammer 14 angedeutet ist. In diesem Fall sind die Steuer- und Rechenmodule vorzugsweise Programmmodule und die Steuerleitungen 7, 8, 9, 10 sind beliebige Kommunikationsmittel innerhalb des Rechners.Mention is still the control device 11, which includes, for example, input means 13 for a machine operator and other computer capacity. As a rule, the changes in the operating parameters are initiated from here 11, 13 and transmitted via the communication means 9 to the computing module 6 or control module 5. However, it remains to be noted that it is FIG. 2 is a functional or schematic sketch. Thus, an industrial computer can also combine the entire functions of the control device 11 and the modules 5 and 6, as indicated by the curly bracket 14. In this case, the control and computation modules are preferably program modules and the control lines 7, 8, 9, 10 are any means of communication within the computer.

Auch die Art der Drehmomentübertragung 12 von Antrieb M2 auf den Formzylinder D2 ist beliebig.The type of torque transmission 12 of drive M2 to the form cylinder D2 is arbitrary.

Die Figuren 3 bis 5 zeigen den Verlauf von Geschwindigkeit, Beschleunigung sowie der ersten Ableitung der Beschleunigung, nach der Zeit gegen die Zeit aufgetragen, wenn die Geschwindigkeit der Materialbahn während eines Zeitraumes gesteigert wird, um dann wieder auf dem erreichten höheren Niveau gehalten zu werden. Bezugszeichenliste 1 Bedruckstoffbahn 2 Leitwalze 3 Registersensor 4 Steuerleitung 5 Steuermodul 6 Rechenmodul 7 Kommunikationsmittel 8 Kommunikationsmittel 9 Kommunikationsmittel 10 Kommunikationsmittel 11 Steuervorrichtung 12 Drehmomentübertragung 13 Eingabemittel (in der Regel Tastatur) 14 geschweifte Klammer 15 16 17 M2 Motor, Aktormittel da/dt 1. Ableitung der Beschleunigung nach der Zeit v Geschwindigkeit a Beschleunigung K Maschinenkonstante E Elastizitätsmodul der Bedruckstoffbahn B Breite der Bedruckstoffbahn D Dicke der Bedruckstoffbahn D1, D2 Formatzylinder P1, P2 Presseur F1, F2 Farbwerk The FIGS. 3 to 5 show the course of speed, acceleration and the first derivative of the acceleration, plotted against the time versus time, when the speed of the web is increased during a period of time, and then held back to the achieved higher level. LIST OF REFERENCE NUMBERS 1 printing material 2 guide roll 3 register sensor 4 control line 5 control module 6 calculation module 7 means of communication 8th means of communication 9 means of communication 10 means of communication 11 control device 12 torque transmission 13 Input device (usually keyboard) 14 brace 15 16 17 M 2 Motor, actuator means da / dt 1. Derivation of the acceleration after the time v speed a acceleration K machine constant e Elastic modulus of the printing material web B Width of the substrate web D Thickness of the substrate web D1, D2 format cylinder P1, P2 impression roller F1, F2 inking

Claims (10)

  1. Method for correcting a register error
    - which occurs as a consequence of a change in the operating parameters (v, a) of a printing machine,
    - the change in the operating parameters of the printing machine being performed at or by a control device (11)
    - and a control module (5, 6) determining register signals,
    - which drive the actuator means for correcting the register error,
    characterized in that
    - the control device (11) conveys the change to the control module (5, 6),
    - which, by means of the change, determines the register signals,
    - which drive the actuator means (M2) for correcting the register error.
  2. Method according to Claim 1,
    characterized in that
    the operating parameter 8 (v, a) which is changed is the speed (v) of the printed material length (1).
  3. Method according to one of the preceding claims,
    characterized in that
    the register error is a longitudinal register error.
  4. Method according to the two preceding claims,
    characterized in that
    the control module (5, 6) uses a quantity derived from the speed (v) of the length in determining the control signals.
  5. Method according to the three preceding claims,
    characterized in that
    the control module (5, 6) uses the second derivation of the speed (v) in accordance with time (da/dt) in determining the control signals.
  6. Method according to one of the preceding claims,
    characterized in that
    the control module (5, 6) resorts to empirical values in determining the control signals.
  7. Method according to one of the preceding claims,
    characterized in that
    the control module takes into consideration features of the printed material length such as its modulus of elasticity E and its width B and thickness D in determining the control signals.
  8. Method according to one of the preceding claims,
    characterized in that
    the register error is corrected at a gravure printing machine.
  9. Method according to one of the preceding claims,
    characterized in that
    the register error is corrected at a serial printing machine.
  10. Device for correcting a register error
    - which occurs as a consequence of a change in the operating parameters (v, a) of a printing machine,
    - the change in the operating parameters (v, a) of the printing machine being performed at or by a control device (11)
    - the device for correcting a register error comprising a control module (5, 6) which determines register signals and, using these register signals, drives the actuator means (M2) for correcting the register error,
    characterized by
    - a connection (9) between control device (11) and control module (5, 6) for conveying the change to the control module and
    - a control module (5, 6) for determining the register signals by means of the change.
EP05772246.4A 2004-07-15 2005-06-29 Precontrolling a register during speed changes Revoked EP1773592B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410034431 DE102004034431A1 (en) 2004-07-15 2004-07-15 Register pre-control for speed change
PCT/EP2005/007068 WO2006007951A2 (en) 2004-07-15 2005-06-29 Precontrolling a register during speed changes

Publications (2)

Publication Number Publication Date
EP1773592A2 EP1773592A2 (en) 2007-04-18
EP1773592B1 true EP1773592B1 (en) 2015-05-27

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EP (1) EP1773592B1 (en)
DE (1) DE102004034431A1 (en)
ES (1) ES2545378T3 (en)
WO (1) WO2006007951A2 (en)

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DE102007017095A1 (en) * 2007-04-10 2008-10-16 Robert Bosch Gmbh Method for operating a printing machine
EP1980396A3 (en) * 2007-04-10 2011-08-24 Robert Bosch Gmbh Method for adjusting printing press modules
DE102007024323A1 (en) * 2007-05-24 2008-11-27 Robert Bosch Gmbh Method for the dynamic adjustment of a printing machine module for correcting a first index comprises changing the first register and decoupling further registers using a first correction value for the module
DE102007059066A1 (en) * 2007-12-07 2009-06-10 Robert Bosch Gmbh Axis correction method for a processing machine and a processing machine
DE102008021447A1 (en) * 2008-04-29 2009-11-05 Manroland Ag Method for operating a processing device integrated in a web press
DE102012017575A1 (en) * 2012-09-06 2014-03-06 Robert Bosch Gmbh Method for controlling processing register in processing machine for processing web, involves specifying controller parameter as function of variable clamp, when controlled value of controller parameter is controlled by control device

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EP1773592A2 (en) 2007-04-18

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